The Sweaty & Wet App, available for iOS and Android devices, is best operated by two people. One needs to hold a copy of Moosejaw’s summer catalog which, when seen through the lens of the app, is transformed into a virtual water gun. The other needs to operate the app, using it to select a model to “wet down.” The app operator can then watch as that model’s clothes become partially transparent on-screen, as shown in the video above.